clientactivator.java

基于OSGI的clent代码 可以用

package exampleclient.osgi;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

import example.service.NameService;
/**
 * This class implements a bundle that uses a name
 * service to check for name existence in the name array. This bundle
 * uses the first service that it finds and does not monitor
 * the dynamic availability of the service 
**/
public class ClientActivator implements BundleActivator {

	/**
     * Implements BundleActivator.start(). Queries for
     * all available name services. If none are found it
     * simply prints a message and returns, otherwise it reads
     * name from standard input and checks for their existence
     * from the name array that it finds.     
     * @param context the framework context for the bundle.
    **/
	public void start(BundleContext context) throws Exception {
		ServiceReference[] refs = context.getServiceReferences(
	            NameService.class.getName(), "(ClassRoom=*)");

	        if (refs != null)
	        {
	            try
	            {
	                System.out.println("Enter a blank line to exit.");
	                BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	                String name = "";

	                // Loop endlessly.
	                while (true)
	                {
	                    // Ask the user to enter a name.
	                    System.out.print("Enter a Name: ");
	                    name = in.readLine();

	                    // If the user entered a blank line, then
	                    // exit the loop.
	                    if (name.length() == 0)
	                    {
	                        break;
	                    }

	                    // First, get a name service and then check
	                    // if the name is correct.
	                    NameService nameservice =
	                        (NameService) context.getService(refs[0]);
	                    if (nameservice.checkName(name))
	                    {
	                        System.out.println("The Name is Correct.");
	                    }
	                    else
	                    {
	                        System.out.println("The Name is Incorrect.");
	                    }

	                    // Unget the name service.
	                    context.ungetService(refs[0]);
	                }
	            } catch (IOException ex) { }
	        }
	        else
	        {
	            System.out.println("Couldn't find any name service...");
	        }

	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
	}

}